<template>
    <div>
        <button @click="add">number 的值是: {{number}}</button>
        <h3>首页</h3>
    </div>
</template>
<script>
export default {
    data() {
        return {
            number: 0
        };
    },
    methods: {
        add() {
            this.number++;
        },
    },
    mounted() {
        console.log("number 的值是:" + this.number)
    }
}
</script>